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The Second Tallest Structure in the World: Views from the Tokyo Skytree

It's no wonder cities around the world see the appeal of soaring observation decks. They give visitors an unparalleled perspective of the environment below while instantly becoming revenue-rich tourist attractions. The CN Tower in Toronto perfected the experience by including two observation platforms in its design, one of which was perched 447 metres above the ground, the highest such viewing area in the world. It was also the world's tallest freestanding structure until the engineering marvel was dethroned in 2007 by the current record holder, Dubai's Burj Khalifa.